Observation of β-Amyloid Peptide Oligomerization by Pressure-Jump NMR Spectroscopy
Brain tissue of Alzheimer’s disease patients invariably contains deposits of insoluble, fibrillar aggregates of peptide fragments of the amyloid precursor protein (APP), typically 40 or 42 residues in length and referred to as Aβ40 and Aβ42. However, it remains unclear whether these fibrils or oligomers constitute the toxic species. Depending on sample conditions, oligomers can form in a few secon